Electric control for elevators.



' A. WARD.

ELECTRIC CONTROL FOR ELEVATORS.

APPLICATION FILED MAR. 13. 1915.

Llfiflfi'Yfi. Patented Nov. 16, 1915.

3 SHEETSSHEET l.

A. WARD.

ELECTRIC CONTROL FOR ELEVATORS.

APPLICATION FILED MAR. 13. 1915.

' wmm.

Patented Nov. 16, 1915.

3 SHEETSSHEET Z.

flvwwrtoz MM/M m ig w W COLUMBIA PLANOORAPH C0,,WASHINOTON, n. c

A. WARD.

ELECTRIC comm FOR ELEVATORS.

APPLICATION FILED MAR. I3. 1915- I v Patented Nov. 16, 1915.

3 SHEETS-SHEET 3- wwm l awe/14 601 COLUMBIA PLANOURAPH co..w,\sH|Nu'roN. D. c

- litit fiid.

run sra rns 'a rnr opinion.

ARTHUR WARD, F GREYSTONE, RHODE ISLAND.

ELECTRIG CONTROL FUR ELEVATORS.

Application filed March 1-3, 19 15.

eitherascending or descending is prevented should one of the doors of the elevator shaft be left open.

The present invention is particularly adapted for hydraulic elevators though capable of use with other types of elevators as well.

The primary object of the present invention is to provide an improved structure for preventing operation of the elevator in event of one or more of the elevator shaft doors being left open.

A further object of the invention is to provide a simple control in which a simple form of switch is mounted on the single or double doors controlling each ingress to the elevator shaft.

In the drawings-Figure 1 is a view partly in section of a part of the invention, Fig. 2 is a similar view of another part of the invention, and Figs. 3 and 4 are plan views of the motor reversing switch, showing the latter in its two positions. a

In the drawingsan elevator cage 1 and double doors 2 and 3 for the shaft are shown. At the top of the doorway there is arranged a casing 4.- in which the door switches are located. The circuit closer is of the double type in this instance so as to require that both doors be closed before the elevator can be started and includes downwardly movable plates 5 which carry insulation blocks 6 to which latter spring switch blades 7 are cen trally fixed, the blades 7 when the doors are closed engaging contacts 8 and when the doors are open engaging contacts 9. The above structure of circuit switch may be best understood from Fig. 2 in which the switch is of the same general type as that above described, the plates 5 being pivoted at 10 and tensioned' by coil-spring 11-, as shown. The lower contacts 9 are in circuit,

which will be later hereinafter specifically described, with a magnetic reversing switch Specification of Letters Patent.

Patented Nov. 16, 1915.

Serial No; 14.,166.

13 while the upper contacts 8 are in circuit, also later hereinafter specifically described, with the magnetic reversing switch 13. An electric motor 15 which'has reducing gears associated therewith is in circuit with the reversing switch 13 by means later specifically set forth. When the doors are closed sothat the elevator may be operated the balanced valve V of the hydraulic system is in open position and the door switch is held closed by-the closed position of the doors. When a door is opened the plate 5 of the door switch will drop, completing the circuit through the motor 15 to rotate the latter to bring the arm 17 into the dotted line position shown in Fig. 1 which through the medium of the cable 18 connected to the weighted arm 19 of valve V permits said weighted arm 19 to drop, closing the valve and thereby preventing operation of the elevator by shutting off communication between the hydraulic cylinder 20 and the piston that operates in cylinder 21.. When the door is closed the plate 5 of the door switch will,

by reason of beingengaged with the door, he moved to closed position, thus closing the circuit through the motor to reversely rotate the latter and to return the arm 17 to its full line position, thus lifting the weighted arm of the balance arm V which will permit the flow of water to operate the hydraulic piston and the elevator.

Referring now to Fig. 2 it will be seen that a fan 29 is pivoted in a casing 23 and normally contacts a latch 24 mounted on the end of an arm 25 that is pivoted at E6 and has a depondin end 27 arranged ad- ]acent a magnet 28. .n armature 29 1S arranged on the end 27 of arm 25. The

round which is in the nature of a wheel 30 has twoperipheral V-cuts 31 into which a V-shaped locking piece or detent 32" on arm 25 isadapted toengage andwhen magnet 28 is energized it will attract armature 29 and lift arm 25 and therewith the locking piece 32 out of the notch 31 and at the same time raise latch 2% so as to release fan 22,and also lift a bottom spring 32 tocontact with a top spring 33 and close the motor circuit, for which purpose a vertical arm 345 depending from arm 25 is connected to the bottom spring arm 32 to release or lift the latter into contact with upper spring arm 33. The fan 22 and wheel 30 are driven from the 'gearing'and may be operated for instance 5- t e fan froiathe shaft 17 of gear 70, and the wheel30 from the shaft 17 1 .of gear 71. r

The .above described means is utilized for the purpose of imparting just sufiicient momentum to the motor to efiect lifting of arm 19 f W6 V or to lower the lattergdepending upon the position of the door. One

of the circuits operates on the coil ofthe motor for clockwiserotation, while the other .circuit operatesthrough connection with the armature of the-motor for counter-clockwise 'movement.

The reversing switch 13 includes a double set'ofmagnets 35 and 3.6 and an armature 87 having insulated contacts 38 at its ends, the armature being guided in its movements in the space between the two sets of magnets by any suitable means, for example slots 60 in the switch casing'and pins 61 on of the circuits as in position when the door Magnet'28 is thus or doors were open and the door switch at the instant of the closing of the door or ,doors to establish the circuit to operatethe various parts to lift or open the valve V to the position shown in full lines in Fig. 1.

The operation is as follows: The closing of the door causes blade 7 to occupy the position shown in Fig. 2 in which it engages the terminals 8 whereby a circuit will be established, as follows, namely, from the right hand terminal to wire athrough magnets 36; wire I) to wire 0 to contact 43; spring arm 40 of wheel 30 to ground'and from the latter to magnet 28 and from the latter through wire (Z to split 41 and through wire 6 to the batteries B; from batteries B to wire f; to split 44; wire 9 to split 45; and from the latter by wire h s to the left terminal 8, where it crosses blade 7 to the right terminal. 1

energized, attracting armature 29, lifting arm 25 and its parts 24,

H25,- 32, 32, and 34, releasing fan 22 and wheel 30; thus establishing the motor circuit, and due to the energization of the magnets 36 the armature 37 is attracted thereto as shown in Fig. 8. The motor circuit receives its power from the batteries 13 and is as follows; raising of arm. 34 enables the lower spring arm 32 to rise and enswitch '13; wire 62; contact 38 of armature .37 contact 49; wire 1' to the motor brush B; to motor brushB through'wire 7a to 'the contact 49" of switch 18; contact 38,

wire 62 and terminals 48'; through wireZ to terminal C of the coil of the motor;

through wire on to split 41 and from the latter to wire 6 to the battery and from the latter through wire 7 to split 44 and from wire it to terminal 51 of wheel 30 so as to cause spring arm 40 of the wheel 30 to contact with the terminal in which position of the parts arm 17, having been moved to the full line position of Fig. 1, will open valve V, thus enabling operation of the elevator.

lVhen arm 40 of wheel. 30 is in cngagement with contact and the door of the elevator is opened, plate 5 drops carrying blade 7 therewith and into engagement with contacts 9, whereby a circuit will be established to reverse the direction of rotation the latter through lower switch arm started, revolving of the motor 15 to bring the parts to the dotted line position of Fig. 1 in which the valve V is closed and operation of the system rendered impossible.

The motor reversing circuit is established as follows: From magnet 28; to wire (Z,- to split 41; wire 6 to batteries; wire f; split 44; wire 9; to left-termial 9; blade 7; right terminal 9; wire 0 to magnets 35 of the reversing switch 13, which attracts the armature 37 to the position shown in Fig. 4; Wire 29 to terminal 52; arm 40 to ground and from the latter to magnet 28 thereby establishing a reverse motor circuit and the motor is operated but in a, reverse direction, as followsthe contacting of the spring 32 with the arm 34 closing a circuit from ter- 'minal 47; wire 2' to terminal 48; wire (52,

contact 38, contact 37'; cross-over (33; contact 49; wire 76 brush 2 to brush B; wirej to contact 49; cross over 63; contact 37 contact 38; wire 62; terminal 48; wire Z to terminal C ofcoil of motor, through coil to terminal C; wire on to split 41; wire a; battery B, wire 7, split 44, wire at, terminal 51; spring 32, arm 34 to terminal 47. As soon as the arm 25 is lifted the rotation of wheel 30 brings the high side thereof beneath locking part 32', thus preventing the arm 25 from dropping to a position to open the motor circuit and lock the fan, and by reason of the rotation of wheel 30 as the arm 40 breaks its contact with one or the other of the terminals 43 or 52, the circuit of magnet 28 is broken and the full battery power is used on the motor circuit.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is gage upper arm 33, thusr closing a circuit from terminal-47, wire 12' to terminal 48 of 1. In an elevator control, in combination with means for shutting off the power, a motor, means actuated by the motor for operating the first named means to elevator operating position, motor reversing means, means to hold the motor locked against movement, energizable means to actuate the locking means, a door actuated circuit closer,

and electrical circuits including the motor;

The motor is thus the motor reversing means; the circuit closer and the energizable means whereby when the door is closed the motor will be momentarily operated to move the first named means to elevator operating position, and when the door is opened the motor will be reversely rotated to'move said first named means to elevator non-operating position.

2. In combination with means for controlling the power of an elevator, a motor for operating said controlling means, a door controlled circuit closer, means to reverse the motor and an electrical circuit including the motor, circuit closer and reversing means, whereby when the door is closed the motor will be actuated to release the elevator power and when the door is open the motor will be reversed to shut off the elevator power.

3. In combination with an elevator power control and an electric rotary motor, means actuated by the motor to operate the power control, and electric means controlled by the elevator door which upon closing of the door rotates the motor to release the power and upon opening of the door reverses the motor to shut ofi' the power.

4. In combination with an elevator power controlling means, a motor for operating said controlling means, a door controlled circuit closer, a reversing switch for the motor, means to lock the motor against movement, energizable means to operate the locking means, and electrical circuits including the motor, the circuit closer, the switch and energizable means whereby upon closing the door the circuit through the motor will be closed and the motor operated to enable operation of the elevator and upon opening of the door the circuit through the motor will reversely operate the latter, to prevent operation of the elevator.

In combination with an elevator power controlling means including a valve, a rotary motor, means operated by the motor rotations to actuate the valve, and electrical door controlled means for actuating the motor whereby when the door is closed the motor is rotated to open the valve and when the door is open the motor is reversely rotated to close the valve.

6. In an elevator control, in combination with means to shut-off and allow operation of the elevator, an electric rotary motor, means connected to said first means and operated by the motor rotations to control operation of said first means, and electric means controlled by the door whereby when the door is opened the motor will be rotated to shut off the first means and when the door is closed to reversely rotate the motor to move the first means to position to enable operation of the elevator.

7. In combination with an elevator control including a valve to control the power,

a motor having an arm connected thereto, means connected to the arm and valve for actuating the latter from the former, a door switch, and a reversing switch for the motor, and electrical connections between the motor, and the switches whereby when the door is closed the motor will be started to operate the arm to move the valve to open position and when the door is open the motor will be reversely operated to move the arm in the opposite direction and move the valve to closed position.

S. In an elevator control, in combination with the power means for the elevator, an electric rotary motor, moans controlled by the motor to open and to shut off the power, electric means to reverse the motor, and electric means controlled by the elevator door to rotate the motor whereby when the door is open the power will be shut off and when the door is closed the power will be restored.

9. In a hydraulic elevator control, means to shut of]? the power, an electric rotary motor, means operated by the motor rotations to actuate the shut ofi means, a reversing electrical switch for the motor, a door switch, and electrical connections between said motor and switches whereby when the door is open the power is shut off and when the door is closed the power is restored.

10. In an elevator control, means for shutting off the power, a motor, means between the motor and shutting Olf means for oper ating the latter from the former, a reversing switch for the motor, means to lock the motor including a lever having a detent, a motor driven wheel having parts to interengage with the wheel, energizable means for operating the lever, means for electrically connecting the parts, means controlled by the door of the elevator whereby when the door is closed the energizable means will be energized to attract the lever, release the motor lock and establish a circuit through the motor and means whereby after the motor has operated a predetermined time the circuit through the motor will be opened by the wheel, the door when opened closing a circuit through the reversing switch to reverse the direction of rotation of the motor.

11. In an elevator control, in combination with means to control the power, a rotary motor, means operated by the rotary motor for actuating said power control means, and door controlled means to effect movement of and to control the direction of rotation of the rotary motor.

12. In an elevator control, in combination with means to control the power, a rotatable electric driven element, means connected to said element and to the power control means to actuate the latter from the former, and electric door-controlled means to effect actuation of the element to render the power operative when the door is closed and to ren- 'der the power inoperative when the door is effect control of the normal and reverse mo- Gopies of this patent may be obtained for tor movements, and electrical circuiting means including the motor, switch and door controlled means.

In testimony whereof I have signed my name to this specification in the presence of .-F

two subscribing witnesses.

ARTHUR WARD. Witnesses:

ADA E. HAGERTY, J. A. 'MlLLER.

five cents each, by addressing the Commissioner of Patents; Washington, D. C. 

